How can I replace @MockClass, which was deprecated?

I have code, which is using old version of jmockit library.

@MockClass(realClass = SomeClass.class)
public class MockSomeClass {
    public SomeClass it;

    @Mock
    public void $init(DataSource dataSource) {
        Deencapsulation.setField(it, new MockDataSource());
    }
}

How should I change @MockClass annotation?